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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'edb1e2b5dc5fc4c514dcaaebdfa649169740978b608b27f14fe4ba6d7ad37d2b' 
  AND token = 'ZieFhN471ocrx5BAT4liOffhF3TLbnz2VDJ4xpk/ZUY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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