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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '0d7a05e01599a7778e2aa47c95e7dba283fa6d559b5247702cf3b04023ad0fb2' 
  AND token = 'aFHMdv8Bh2Oe/F4at3AfRHYIHT+OkvabCJgnmaCanc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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