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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e632b97f056ff86adc86dc74dd0bb80edd275563d6018e66658bc11c892b3e71' 
  AND token = 'rwDI5PM5xYP/ba1HUJWVY6g5ROjw7XcvrRO5zsMH4hg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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