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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e968ee6279633c13455eb9176ca004a652e5d6eba185e9cb573bb3e65a72ccc' 
  AND token = 'GMW0DfdsRVaVAAkQ04kzAdQ6POopVoAre5px3s2AANo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}