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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '00aad4a879402589761c69e175444960bed43464bc30633a81c7238606b17b21' 
  AND token = 'FmP91F19/kaL2GrP0FoNoddreQfZpNk8/iKudgznLK8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00060

JSON explain

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