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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ead8d38707ed5dd2bc8ae6bb0e3cd945c628981b7eb731d5fd62985de956958' 
  AND token = 'kEMStbVWXFZsPy+4+6cabvyTBufqHd59T102jcBSyYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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