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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '83f2ba0f8975c45f361a884ca150dbf5d38e4f48bf18512a3ae19cd061ddec2e' 
  AND token = 'rWhnglF/z6wZU8zzZP1nbtSNklU6+fENwXyeK45uITQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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