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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2de98eb2a531ce26f78b2273f1ed63e0a3d0306b8bae0b6fadf2cac07f5651aa' 
  AND token = 'SPnG3OhEaTUWeFKKa3blV0TBdC81xbfgHxS7RJPL//0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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