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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'aa182c38d220469a22d3d742f4cd2d5dce9b45c03071754a56c52231e6ec880f' 
  AND token = 'M1LcfV09JJCryfcdBAdAyxJdqis8ruXviXXP8EizNC0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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