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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '010ed7aaa40fe691315ec51df06fcdff0fe3b9c8a666e1f97284b9b2e66fef82' 
  AND token = 'qp5rAkJPM2/hu5j/wqx/a1bbN+VPuc8qsKkcvdeWoqE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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