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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '207dcc9594dacb45b7330c924d5b8f953cd8bc9778eb86f52608418fd0595a5e' 
  AND token = 'sHE0kFQHcF/kZU5wk0Lh+f+TchZBs0Rvso/cnq0WH2Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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