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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '330ea1593cc2002a74d4087d79f94c97e38f741373569d0f61a19c934f508340' 
  AND token = 'Eq/FUEb56Er605pCljYsy1D95d+7l/bKG8fDXgXWVVw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

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