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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3aca67c5e029e62dbf3edd8a1f9317705ba0bbc2627bff93b0811f0bf3c22916' 
  AND token = 'CAm2bNGuT4ll3+2DXp/m7P0JqJXB6TyMAVizBcaclmI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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