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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '97f8cd014734dd1e3c3bacfce13b050c6e0b5ab72de147cdb5ae89031a69a3ea' 
  AND token = 'jso6GGcYVJS/9T1+9byVQhbAqPqfPAFZ6604Dd4iKME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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