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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee17f25763110bcc7c550e98f4cf284d9ee28f9d784664d409a758fd5debbf05' 
  AND token = 'CEGLSPGFx0TVF/U7oqawbe2tTjw/huS9nd/CGpLmSKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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