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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7fe410c7955174db28e01bbb2c76fdd3755a30e54aabd8a1fe7ba0cf1d710a34' 
  AND token = 'JOqSDjbr7ne9wN8W/+qkwhE7gBDy78334KBNuViqMuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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