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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a95a20db6df92a0b6c0ddd76b3811d000d803c24a85482dffa7cda9149e006b' 
  AND token = 'FXBaG76u2aQR8IFeoCgu2SmaEjN4Wm3qlr2h1IX3dJQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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