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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ce2f72d2c213dc56c1a066ba8d8ed6f774a7c47f08ac1cae4eaa6d32add9fb3' 
  AND token = 'P4ZOMQlfKIXNcnHMlDpW7i5En5h/SQ4NZ9YWJnGmnes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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