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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fa630d3a20f9247e8476d1e4a24235b199b71c834945fdde393b1c7e6451a41' 
  AND token = 'GF3UG+pTidU7GhUSLgkRU3iBivS+MMlOwhox8VCLlFE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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