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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f765baa4db300f08ad4340064f0dd770b3192e7e4085ccc6aa527138f626f4a6' 
  AND token = 'NPQgb241TsPaCtgeRWliWpubsQLpFzz7k08o4O3O5eY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00130

JSON explain

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