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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bbb95ff2624cfc5fd26eeb6c9a7fcc8fe2cd3bbf139bda9864afaf04fc0a15cd' 
  AND token = 'cG+ItJHD+e58wpaWYActh9LIMN98RfPpnH29EBDvCQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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