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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3bb3b05f46cd3584642ddc1a1304188e337831664d56d96783e744db17e466ed' 
  AND token = 'IRGhQz+mLnb0mNtgRo8S+UsJaDh3D8cl48RBxstsQXw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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