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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '98d7d6949612a05a99cdf7947e598fa22dba9bfd15196ae7b1f82b0661a337c6' 
  AND token = 'BqdkKWKPAYo4c0RVjLybq2NqudfG3aBdyoCy+RDpJLs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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