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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9f1325403679fd878e3399d42dd436cba54c8e7ef8bed45812ba28fa8df3dbe' 
  AND token = 'ahbHFkAUv06GtGHPl1xzQCA2wUdUqIHWZI5ArfUxRw4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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