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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a06fe768b1dd4a1e6693182eddebafa8c3000279ece0a3d7d0422eed783ae3cd' 
  AND token = '+m2Gdpy+Qxqr6ADKXmE1D7rbwjnNISI1X7Mwj/UJH98=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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