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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '1ce178f4f4e3405f79141ff16ea2c37aaf9283d7a31365124da399b874826331' 
  AND token = '1PIvY5eGNrym7kQR1ED1qMMcgHOPSddRJCS5ruLUYcI=' 
  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"
    }
  }
}