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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf647a824dd7e28096ca52a0b76b6fcec5a5c45d02705a142d72d82bef8c0523' 
  AND token = 'J7LQlj/h73bopr2dXu4g6OdkH90ad8j/l4gQ/pC1uDE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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