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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ee0756d14831fc5dc95e0b3b5e166bb09587f199dda56aea3b91f119bdb63b7' 
  AND token = 'ot5lajyybuom3Om6e7LmXAvHsMPqEGVIRFMXZuMW0FE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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