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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '35d3ec2b0e9cd5b1f51144b4c26d136f5563da2ba259cc4aedb3a64a52ae6e40' 
  AND token = 'H6mNWDmp0b5ow/unjEn2wyLY9hePGHpry9vjrmJkzTM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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