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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '83c8054503db480f6ecd2239ba9f91b11a250e9c2ddd76147905266c2d9ba426' 
  AND token = 'Y6mGyZWjL0zX5SX4mH1CoDzyTpv6+O9kx3+0CayTP10=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}