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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '11d73f4d6c25c3f3e7984f2be0a51f011b861c8765ffcbbcec60033e1f7b3ce7' 
  AND token = 'Mtw+4kgcnNpylVBODWcm+JKjrHm+SByNTkAmzh0pvbk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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