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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc0e24966ab66184c2f68f6de602876449b3fb7eff6b5fb99af75229c41c4ec7' 
  AND token = 'mHsV8sJrTlUrmLBUZFWN4YDF6HAhf7Xhb4Ddrj61bbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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