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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '4fc42b41f14116e439446ea354efdd639a0196cff14eebab15a7ae8ba8fbc18c' 
  AND token = 'nqwhlyPVmn7WRvEq18/TtMY70goiy2IsjdA8+JKdvrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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