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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05824f1de24c5080fcea41b9400b32028e65c982528e8656b8e21a32164612b8' 
  AND token = 'Tr4luJ9Lx61mfQPRQrhVf+Y5DG9t8S5S/Ogs8GLd5UA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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