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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04e9a460b86319b1b79410e30b271f20f0ec0326b660afd073556b16f3dcb6cf' 
  AND token = 'wQ22MyOK5rD4P6NByEttJ0008vi7whn+0YwPuPAHu7M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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