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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13f8007e228a3ecf791572d71135add88752a9b0dbb09ede8403c12d2a41f0ba' 
  AND token = '/fdcUHy/3wkJgyhuYshsdyJ/ta1jyZpFxfwbv9gdbuk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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