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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '035bfd601c5abc95b5cb86c3ca5156d65d35d07f4228f3e9e84bdd9dd63b71fc' 
  AND token = '3ax6J/pOPUUc+T2DA6xzR66x2uHW3W1fE6yljTdXm8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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