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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'b609b88265cb74c95959090b8cec8ab8d87a9ac7d2817651004f40740848936a' 
  AND token = 'XkTvgrjBqc5HxKugHRIbqUSGro2T2zF2U3ln90uZaEQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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