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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e32f980cb1ae7a23cb7e0cf05796897236536c08760682af4936a1d9f4ffa9a' 
  AND token = 'pwpI3vzXnw7fdsprjO7J6HP/n5EOXCt6YQIAwWhcfOU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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