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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33816adbc9e0f0dba9ce36096ad2de610c8decfdd9596d7be873e09538decc50' 
  AND token = 'cH+Dce4N2NXaudGmbqWlIY/og2qDMujt+qct7WY6TT0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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