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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'bc34bf7cd20afef9186dab1151b200ac07749d441e7d74bbb37273146d894fda' 
  AND token = 'aCmzF2zAR7eWBGkAPx/B1U7YFM5BpIWCqjNGzjrpDXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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