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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '693fa57c99fc0d6d2cf70a8b8faf9c4164db5e6acaef0164e0be3d79f64bdcf5' 
  AND token = 'Bn4CXx0m7SinX/OqDvj9c8H8qTMP3a37NRx7uyeMJQ8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}