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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3aec90e68b11f3ac240325adcfc1b8d00cf782119ca7c02cd15ef8d307f2413b' 
  AND token = 'XO1jPuYhPLyZVdvTUaSlYYwHonIULOb2IE3QYC1rbYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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