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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '26814d33c72dc7524b76b1697f5832a72e367dc5f7ea20a10164fc57313d324b' 
  AND token = 'y2TeSdU2NkPX17rqAPgTP0n3XR4Q6Ue/hbwKAnPp3uo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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