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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46954ebb5c9b6e5a86566fae63f1415d0104fae07ea8bf8efa8bce4e7fa9482a' 
  AND token = 'uzpMiWlvz0kR+5VRTEYUzHK7I86e7K7n0PfhJuHX018=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00086

JSON explain

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