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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f273925aab9de3c4745801056b9dd4c4afe184b8b2b0f831fea2725b05838a0d' 
  AND token = 'h2qALlwWTKIssIP9v5y8IQXYYl7aWpr/icnvuaFCC9U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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