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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '24b762eb40215553aa230c5b725ee1b9c091de890c55e2033908b826159f3061' 
  AND token = 'w9Yl3Wnk8tndbX8em1OS3jUQ7fXdI3JU6T2Yhy4X2jw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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