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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edab8a575c112423868c5f72972bb464654a094a41f9f67e56f6f79519e60692' 
  AND token = 'bK8Fe9tbF3bLK4ebJHy4tlcdMpGHteHDcrkomnWi7oU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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