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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b07bcd6622cfe023c82138005c0653ea6840956124c0c791d51babebaf6bf082' 
  AND token = 'A+9BCqdpooNMLNX7f2EnoxX3ijcP8WXUNItLh1ViVDU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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