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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c2eea27b1acc90d2c7ecd649a178f0fa8f0627f965a9e38809ab8fbe20cf191c' 
  AND token = 'SqqYxjaUVdxRXFjIhB1m1qOrqmiAtw+i4R3sA4UDrh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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