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SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '59f808e9e90db9c91fed6364a4afe9c34340dd49ca9f0f05ce4a6e165842fe66' 
  AND token = 'IrUaX8yHma6x3vLTHYNPX3gbp8YUUsS9HhRhkTJz/YE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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