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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f009034b3e0ca442bc014060597959ce5fd2e72d6d6747e6d2f6d81dc8a90418' 
  AND token = 'dCjWJfbjHRav5BAsnYa6kPOH0imR5fAc1ez08mJXXtQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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