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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c342ebec91709eae6e0d2d1fcad2b6df0c4ddaad0d59de0001759224860e6733' 
  AND token = 'F888GBITDPj8IP9hsIqcnHdQawXIUgnPg8xKoh00bmk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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