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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '346cbf8ac55f3e03948c9e79c50cca369e79100959fa26135a9fb7d0cd745ec5' 
  AND token = 'FY4UjK6ad24zpiPgXnBbJrGi9tY1GKWJTTtBcoLoXc0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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