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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '48fc5a4c1a3d1ae9d2243ad3720fdc4ef3b842c1e370b7dd46dae99ea1a355c1' 
  AND token = 'VgPOu0Pi9E3f8fcPeBMe+jcfuj584VXgGRGofgW0P/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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