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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3f575d392a0ac91129032dc80ea6ee41a8e2388014e28ebd27644ffb7d7ce24' 
  AND token = 'EJ/1xkBR8O6LfQYY79RTDWsq0DICYlqu0UBl1gyCvF8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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