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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '131e931caeec4ea5af40fc83d824257b9858fe3c6aff390325a8b813b6caa274' 
  AND token = 'vbMGRES6G1724PAvehpJ2HVd/bccj0lO3p0R3bbaSTE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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