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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '797f5cb91b2266c8da39b21ad257955c85b983df755d0c17539a4f6be28a663f' 
  AND token = 'DLuK1J94Zh73PCyHoC7oyRz3TtRdr1T4/3riyI1/MZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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