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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7cd7999a78fee130ba2f6a0698ea51525dac2ef1a2720ac5c8855af89365bb6' 
  AND token = 'qvPSkGZyT05nxJcIAF246wfgdul/vyG+6g/HX8PulkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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