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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5a45ff1880b91afc259bdd54ff8a6eca8ec7a49fa2f93ee1762a1f69cb9dc0db' 
  AND token = '0oDUjsn6TfjUNBjANM1uVDd7U4UDOiKDSTQgK13gA1s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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